Surveillance video captured the horrifying moment a train passenger was robbed, Tased and thrown onto the tracks by a pair of robbers in Pennsylvania.

The unidentified man was sleeping on an empty train car of the Blue Line in Philadelphia as it pulled into the Millbourne Station about 12.50am Sunday, according to Southeastern Pennsylvania Transportation Authority (SEPTA) officials.

While he was sound asleep, a man and woman stole his backpack and made a run for it when the doors opened at the station.

The surveillance video of the incident shows him waking up and chasing them off the train and onto what appears to be an empty platform.

Scroll down for video

Robbed: The unidentified man was sleeping on an empty train car of the Blue Line in Philadelphia as it pulled into Millbourne Station about 12.50am Sunday

A man and a woman stole his backpack while he was sound asleep. They quickly ran off the train at the Millbourne Station when the doors opened

The passenger ran off the train and chased the two thieves down the platform

The passenger gets into a scuffle with the male assailant, who pins him down on the platform. The woman can be seen on the video pulling out what appears to be a Taser and jams it into the passenger's back

The passenger gets into a scuffle with the male assailant, who pins him down on the platform.

'They struggled with each other for a bit,' SEPTA spokesman Andrew Busch told Philly.com.

Seconds later, the woman can be seen on the video pulling out what appears to be a Taser and jams it into the passenger's back.

The two suspects then callously push the victim onto the tracks before running off with his backpack.

WARNING: GRAPHIC CONTENT

The two suspects then push the victim onto the tracks before running off with his backpack

The video shows the victim laying unconscious on the tracks. It's unclear how long he was out for

The video shows the victim laying unconscious on the tracks, before he awakens and falls down onto the deadly electrified third-rail, which carries about 700 volts.

Luckily, its thick cover protected the man from potentially being fatally electrocuted.

He laid there for approximately 90 seconds before regaining consciousness.

'At some point, he regains consciousness, walks out of the tracks and on to 69th Street Station, where he summoned help,' SEPTA Transit Police Capt. Daryl Jones said.